Description

Reactive Red 133 is a high-purity, reactive azo dye specifically engineered for covalent bonding with cellulosic fibers. This compound matters for its excellent color fastness, brilliant red hue, and efficient application in modern dyeing processes. Industries that require durable and vibrant coloration, such as textile manufacturing for cotton and viscose, are the primary users of this product.

Application

Reactive Red 133 is a key dye in industries requiring permanent, bright coloration. Its primary and related applications include:

• Textile Dyeing: Exhaust and continuous dyeing of cellulosic fabrics like cotton, linen, and rayon.
• Garment Manufacturing: Providing wash-fast and light-fast red shades in apparel production.
• Home Textiles: Coloration of towels, bedsheets, and other household textiles for color durability.
• Industrial Fabric Production: Used for dyeing canvas, webbing, and other industrial textiles.
• Yarn Dyeing: Application in package and hank dyeing processes for sewing thread and knitting yarn.
• Research & Development: Serves as a reference standard and intermediate in dye chemistry research.

Basic Information

Product Name	Reactive Red 133
CAS No.	72979-85-2
Molecular Formula	C31H19ClN7Na3O11S3
Molecular Weight	880.06 g/mol
Synonyms	C.I. Reactive Red 133; Reactive Brilliant Red M-3BE; Reactive Red M-3BE; Remazol Brilliant Red 3BS; Levafix Brilliant Red E-4BA; Procion Red H-EXL; Dianix Red CC; Sumifix Brilliant Red 3BS; Vinylsulfone-based reactive dye
EINECS	Contact for details

Quality Control

Our production of Reactive Red 133 adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested for critical parameters including color strength, solubility, and fixation properties. Certificates of Analysis (COA) documenting purity, shade, and physical specifications are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and moisture to maintain product integrity.

Specification

Item	Specification
Appearance	Red powder
Color Strength	≥ 100% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Identification (IR)	Conforms to standard
Fixation Rate	≥ 70%
Dusting Property	Low dusting

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.